cv joint bolts?

busnutdave · Samba Member Joined: January 27, 2004 Posts: 68

I just got a set of cv boots from BD. They came with new hardware. The new bolts are 12 pt. and the are threaded the entire length of the bolt. Unlike the original ones that have the smooth shank and thread on the outer third. Anyone run in to this before? do the replacement bolts work ok? Do they hold up? or should I use my old ones?

OMcComis · Posted: Mon Mar 02, 2015 4:52 am Post subject:

Mine weren't threaded all the way, but I dont like the 12 point head, they strip out real easy with a regular hex wrench and I couldn't find a 12 point in that size.
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dhaavers · Posted: Mon Mar 02, 2015 5:08 am Post subject:

Nothing like having the right tool - take your pick: https://www.google.com/?gws_rd=ssl#tbm=shop&q=3%2F8+8mm+triple+square+bit

Probably sitting on the shelf right down the street at your FLAPS, too.

(A real expert will be along shortly re: your bolt question...) Wink

- Dave
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Randy in Maine · Posted: Mon Mar 02, 2015 5:29 am Post subject:

The 8mm "triple square" bolt is the least likely to strip out which is why we use them. No need fo rlocktite as they are coated at the facotry. Make sure you own the correct socket (about $5).

Threaded all the way is OK. Make sure you use the torque spreader bars and the serrated belleville washers. Got to have them.

Re-torque after 100 miles.

insyncro · Posted: Mon Mar 02, 2015 6:04 am Post subject:

They will strip without the triple square.
I prefer the 12 point fasteners.
Get the right tool and all is well.

Christopher Schimke · Posted: Mon Mar 02, 2015 7:11 am Post subject:

The bolts that you got are most like the Febi/Bilstein brand. They work just fine, but you will need an 8mm triple square bit and you will need to properly torque them to 33 ft lb.
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Wildthings · Samba Member Joined: March 13, 2005 Posts: 50352

I have bought the correct triple square adapter from many sources over the years and like to find a nice long one (~3-4") that will clear the boot well. Snapon and Mac are marginally better than the ones you can get at most any FLAPS. Remember that a FLAPS can order what they don't have in stock.

One will not find this kind of tool at Harbor Freight or Home Depot.

http://www.amazon.com/Tools-Triple-Square-Socket-8...quare+long

http://www.amazon.com/GearWrench-KDT80450-Triple-S...ple+square

danfromsyr · Posted: Mon Mar 02, 2015 9:48 am Post subject:

the LISLE kit is available at your local flaps (any and all of them)

there's no need to have the incorrect tool. and since I've worked on multiple vans which I've found both types of bolts on the same vehicles.
I carry both a long 8mm triple square and 6mm long QUALITY allen socket.
there's a certain learned 'finesse' to breaking free CV bolts. and sometimes when failure (or additional shop tools) is not an option I'll secure a visegrip to the head and turn both in unison a bit fiddly but creates a quicker success rate when under a car on the roadside or in a junkyard.
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dobryan · Posted: Mon Mar 02, 2015 10:12 am Post subject:

Not sure if this is the correct method or not, but when I install CV bolts I first torque to 15 ft-lbs on all 6 and then go back and torque to 36 ft-lbs and then do a final check.

Never had an issue with them loosening (knocks on wood). I think it helps to torque in increments to get the faces nice and flush before final torqueing. YMMV.
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IdahoDoug · Posted: Mon Mar 02, 2015 10:35 am Post subject:

Also, keep this triple square in your van, as well as the huge allen tool for draining transaxle. Most anything else can be sourced along the way or borrowed from a fellow traveler, but these will not be so easy and are critical when you need them. Since these items live permanently in the van, I always know where they are even at home.
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WestyBob · Posted: Mon Mar 02, 2015 11:22 am Post subject:

All good advice above.

I've had three half axles in three different rigs come off on one side before, the last getting caught in and ripping out my wiring harness and VSS (subie conver). All in the back left side.

I discovered my mechanics were (a) not cleaning surfaces, (b) not torquing to proper spec, (c) reusing tired bolts, (d) and not using new Schnorr (or whatever) serrated washers.

In fact, none of the mechanics around here use any CV bolt washers at all anymore.

I now do mostly all my own work on these Wink

And I always carry those most important tools, nearby at hand, in a small black military canvas satchel.

insyncro · Posted: Mon Mar 02, 2015 11:43 am Post subject:

I'm with Wild on this one.

Image may have been reduced in size. Click image to view fullscreen.

The minute the knurles are worn I sell it on eBay for $11 and they fly Laughing

My cost new off the truck $14.
Pictured is my spare, I always have a new one around for stubborn fasteners.

Also, I only torque with a proper tool, but to install CV bolts I use a Makita 10.8v, not 18v gun, clutched to just snug and not torque.
The 10.8 v gun removes them easily unless someone got animal on them.
Than I usually just cut the head off and replace the lot as they are stretched.

Yes I have collected an amazing tool set.
I am not posting to be showy, rather to show what I use as I have had ZERO CV bolt failures or have any issues with them backing out.

I use brand new fasteners from Mc Master Carr, including the proper washers.
No grease on the threads.
And with vans that have more than stock power, BLUE thread locker on the first three threads of each bolt.

This works very well.

kalispell365 · Posted: Mon Mar 02, 2015 12:59 pm Post subject:

Dylan,
Snap on makes a longer version of that triple square, the part number is
FTSM8AL.

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Merian · Posted: Mon Mar 02, 2015 1:04 pm Post subject:

your Snap-Off guy won't exchange the worn head for a new one?

they bang 'em off right in their truck over here, while you wait replacement

BTW, hit the tip with a grinder when worn to gain longer life; it also puts a concavity on the tip end which can be useful

Finally, who was the German Engineering Genius who hid the rear CV's deep inside the trailing arm? I'd like to XZN his azz.

insyncro · Posted: Mon Mar 02, 2015 2:16 pm Post subject:

Syncro Jael · Posted: Mon Mar 02, 2015 3:13 pm Post subject:

syncrodoka · Posted: Mon Mar 02, 2015 5:13 pm Post subject:

eeebee · Posted: Mon Mar 02, 2015 6:28 pm Post subject:

ThankYouJerry · Posted: Mon Mar 02, 2015 10:01 pm Post subject:

IdahoDoug · Posted: Mon Mar 02, 2015 11:08 pm Post subject:

Thanks for posting that extended version. I predict a brief shortage of these...
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1987 2WD Wolfsburg Vanagon Weekender "Mango", two fully locked 80 Series LandCruisers. 2017 Subaru Outback boxer. 1990 Audi 90 Quattro 20V with rear locking differential, 1990 burgundy parts Vanagon. 1984 Porsche 944, 1988 Toyota Supra 5 speed targa, 2002 BMW 325iX, 1982 Toyota Sunrader


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cv joint bolts?
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